...About those "imaginary" compressor explosions....

Its a pressure vessel, that failure especially looks like a combination of metal thinning due to rust in one way, but also of fatigue.

Every time that compressor cycles, you are making fatigue get slightly worse. Like an airplane, I doubt it matters how long its pressurized for, but how many times. So if this was the primary failure mode, draining every day may not be the right move.

I personally don't use my compressor that often, and I drain it periodically when I use it a lot, especially in damp environments. Otherwise it's got a near perfect seal with a ball valve on the outlet and I leave it pressurized.

You can sonic check, but when do you decide it's dangerous?

Other thing is, there are millions of these things out there and how many blow up a year? 100?
Yep, and what do those folks at Ingersoll Rand know anyway? It's not like they make industrial air compressors, they're just dumbasses who want their customers to cause their tanks to prematurely fail so that they can buy more Ingersoll Rand tanks. That is, if they survive the explosion.
how-often-should-i-drain-my-tank